#sidebar-dimmer {
  display: none;
}
+mobile() {
  #sidebar-dimmer {
    display: block;
    position: fixed;
    z-index: $zindex-2;
    top: 0;
    left: 100%;
    width: 100%;
    height: 100%;
    background: #000;
    opacity: 0;
  }
  .sidebar-active + #sidebar-dimmer {
    opacity: .7;
    transition: opacity .5s;
    transform: translateX(-100%);
  }

}
